A locally nameless theory of objects
Henrio, Ludovic and Kammueller, Florian and Lutz, Bianca and Sudhof, Henry (2010) A locally nameless theory of objects. In: SAFA Annual Workshop on Formal Techniques (SAFA’2010), October 6th and 7th, 2010, 2229 Route des Crêtes, 06560, Valbonne, Provence-Alpes-Côte d'Azur, France.
This paper presents the formalisation of an object calculus in Isabelle/HOL highlighting the binder technique called locally nameless1. This techniques has its origins already in a note at the end of de Bruijn’s paper  introducing the classical de Bruijn indices. In the last few years, with the advent of mechanized proofs in the domain of programming languages, e.g. , this technique attracted new attention. The most recent work on locally nameless technique  provides cofinite quantification, necessary for proving non-trivial properties. Indeed the de Bruijn indices are often criticised, as being too technical, that is why alternative techniques are investigated. The de Bruijn indices method, however, is known to be reliable, and is often chosen in order to focus on aspects of programming languages unrelated to variable bindings. With locally nameless techniques, one expects to spend less time proving auxiliary lemmas dealing with variable bind- ings, but also to obtain theorems that are more convincing because closer to the paper version. Our contributions are a formalisation in Isabelle/HOL of ς-calculus; and an in depth comparison of both locally nameless and de Bruijn complete mechanisations including specification and proofs.
|Item Type:||Conference or Workshop Item (Paper)|
|Research Areas:||A. > School of Science and Technology > Computer Science > Foundations of Computing group
A. > School of Science and Technology > Computer Science > Artificial Intelligence group
|Depositing User:||Dr Florian Kammueller|
|Date Deposited:||25 May 2012 14:29|
|Last Modified:||02 May 2015 04:16|
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